Enameling-powder sifter or dredger.



W1. LINDSAY. ENAMELING PWDER SIFTER 0R DREDGER.

APPLICATION FILED OCT. 9| |913.

Patented Feb. 15, 1916.

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UNITED sTATEs PATENT oEEIcE.

WILLIAM LINDSAY, OF CHICAGO, `ILLINOIS, ASSIGNOB TO L. WOLFF MANUFACTURING COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

ENAMELING-POWDEB VSIF'IEIR, OR DBEDGER.

Original application led August 12, 1912, Serial No. 714,491.

Specification of Letters Patent.

9,1913. serial 110.794,199.

To all whom z't may concern:

Be it known that I, WILLIAM LINDSAY, a citizen of the United. States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Enameling-Powder Sifters or Dredgers, of which the following is a specification. y

This invention relates to improvements 1n enameling powder sifters or dredgers and this application is a division of my co-pending application No. 714491, tiled August 12, 1912, for improvement in enameling powder distributer.

One object of the invention is to provide a hand dredger or sifter for sifting and distributing powder enameling material over the surface of bath tubs and other vessels in the manufacture of enameled iron ware, which sifter or dredger is adapted to be connected to a storage tank or vessel from which the enameling powder is fed automatically at a uniform rate to the sifter.

The invention furthermore consists in the improvements of the arts and devices and in the novel combinations of parts and devices herein shown, described or claimed.

In the drawing forming a part of this specification, Figure 1 is a side elevation of one form of sifter or dredger embodying my improvements. Fig. 2 is a vertical enlarged sectional view of the sieve proper and a part of the hollow feeding handle by whichv it is supported. Fig. 3 is a top plan view of the sieve proper and Fig. 4 is an enlarged detail view of a section of the hollow handle and showing the method of introducing compressed air to feed the powder along the handle to the sieve.

In said drawing, A represents the sieve or powder distributer which, as shown, comprises an irregular shaped body 22 open at the top and having secured thereto at the bottoni a wire sieve or mesh 23. The sieve A is held or supported and carried about from place to place by means of a hollow handle 20, the inner end of which opens into the interior of the boxlike sieve. The outer end of the handle is in communication with feed or conveyer pipe 21 leading to the storage tank for the enameling powder, said storage tank not being shown masmuch as it forms no part of the invention covered by this application. Mounted on the rear end of the handle 20 is a compressed air turbine 47 adapted to be supplied with compressed air from a branch pipe 48 leading from the mam and compressed air supply pipe 51, the latter being connected with any suitable source of supply. The rotor of the turbine 47 is adapted to be rotated at a high speed andthe shaft 49 thereof has fixed thereto an eccentrically mounted disk 50 so that when the turbine is in operation the sifter or dredger will be given a peculiar vibratory motion which is necessary to properly discharge the powder through the mesh 23. As shown in my said application 714491, of which this is a division, the enameling powder is fed from the storage tank by compressed air, the supply of which is taken from the pipe 51 through a pipe 44. As is well known, the enameling powder used for coating iron ware is quite dense and packs or solidifies easily and in order to feed the same automatically to the sieve, must be forced or pushed in what is practically a solid mass. This is accomplished by using compressed air which is obtained from the pipe 51 through a branch pipe 45 which forces the air into the hollow handle 20 at the rear end thereof and by another pipe 246 which extends along the handle 20 and has extended therefrom pipes which terminate in nozzles 46 within the handle 20 (see Fig. 4) which serves to keep the mass of enameling powder in motion toward the sieve proper. The compressed air for the turbine 47 ris supplied through the pipe 4S and the supply of air to all the pipes 44, 45, 48 and 246 1s governed b y a single valve 52.

In practice, the powder is'forced along the hollow tubular handle 20 by the compressed air substantially as a solid mass and flows out into the sifter in a stream and the constant vibratory motion imparted to the sifter By employing a sifter or dredger to which the powder is fed automatically from a storage tank, much time is saved in the application of the powder to the iron ware being treated, which is of great importance, since the powder has to be applied to the iron ware while the latter' is at a very high temperature. Hitherto, the dredgers or sifters have had to be hand filled and the quantity which could be held in the sifter or dredger at any one time was relatively small inasmuch as the enameling powder is,

very heavy and the user or operator is required to hold the sifter or dredger in various positions and as far from the body kas possible on account of the intense heat from the articles being coated. Vhere the sifters or dredgers have to be replenished by hand, the iron ware being coated often becomes so cooled during the interval required for replenishing that it must be re-heated. With my improvements, however, a supply of enameling powder is kept constant and may be regulated to any desired degree and there is always practically the same amount of powder in the sieve proper thereby assuring a uniform discharge therefrom.

Although I have herein shown and de scribed in detail what I now consider the preferred embodiment of `my improvements, f

yet I do not wish to be confined thereto but all changes and modifications are contemplated as come within the scope of the claims appended hereto.

I claim: wg, l

l. In an apparatus of the character described, in combination: an enameling powder sifter having a hollow handle of smaller sectional capacity than said sifter secured thereto; and means adapted to force enameling powder -through the hollow handle to said sifter from adjacent the opposite end.

2. In an apparatus of the character described, in combination: an enameling powder sieve having av hollow handle of smaller sectional capacity than said sifter; and means adapted to force enameling powder through said hollow handle to the sieve, said means comprising a current ofing com ressed air to the hollow handle at a point a jacent the'outer end and at points intermediate the ends thereof, whereby to force powderv along the hollow handle toward the sieve. j

5. In an apparatus ofthe character described, in combination: an enameling powder sifter having a hollow handle; means for supplying compressed air to said hollow handle at a point adjacent the outer end and at points intermediate the ends thereof, whereby to force powder through the hollow handle toward the distributer; and mechanism for imparting a vibratory movement to said sifter. I

6. A hand dredger for sifting and dis,- tributing enameling powder including, in combination: a sieve; a hollow handle secured to said sieve, one end of which opens thereinto; mechanismv for imparting a vibratory motion to the sieve; and means for propelling powder along saidhollow handle to the sifter.

7. A hand dredger for sifting and distributing enameling powder including, in combination: a sieve; a hollow handle secured to said sieve, one end of'which opensn thereinto; mechanism for imparting a vibratory motion to the sieve g., and means for propelling powder along said hollow handle to the sifter, said means including nozzles for compressed air extended into the hollow handle and adapted to direct jetsof compressed air toward the sifter.

. 8. A hand dredger for sifting and distributing enameling powder including, in combination: a sieve; a hollow handle secured to the sieve and communicating with the interior thereof; pneumatically operated mechanism for imparting the vibratory motion to the sieve; pneumatic means for forcing powder along the handle to the sieve;

and a valve controlling both said mecha` nism and said means.

9. A hand dredger for sifting and distributing enameling powder including in combination, a sieve, a hollow handle coinmunicating with said sieve, and means for continuously' forcing enameling powder through said hollow handle in a substantially solid mass. v

10. A hand dredger for sifting and distributing enameling powder ,including in combination, a sieve, a hollow handle ,communicating with said sieve, and means for continuously' forcing enameling powder through said hollow handle in a substam tially solid mass, said means acting upon said powder continuously and also at successive intervals in increased amounts 11. A hand dredger for sifting and distributing enameling powder including in combination, a sieve, a hollow handle communicating with said sieve, and means for continuously forcing enameling powder through said hollow handle in a substantially solid mass, said means comprising compressed air applied at the end of the handle remote from the sieve and at spaced distances lengthwise of the handle.

Signed this 23rd day of September, 1913, in the presence of two witnesses.

WILLIAM LINDSAY.

Witnesses JOSEPH HARRIS, J. H. GAVIN. 

